Turbotorque transformer



sept. zo, 1938. H. FTTIN'GER 2,130,717

TURBOTORQUE TRANSFORMER Filed Dec. 19, Y 1935 --Patentecl Sept. 420,1938

l UNITED STATES PATENT OFFICE TURBOTORQUE TRANSFORMER Hermann Fttinger, Berlin-Charlottenburg,

Germany 3 Claims.

This invention relates to a turbo torque transformer, that is to a gearing in which the turn" ingmoment of a primary shaft, after having been transformed into another turning moment, is transmitted to a secondary shaft. It has already been proposed to insert, together with the primary wheelaiiixed to the primary shaft, a plurality of secondary wheels into the same hydraulic. circuit and to arrange these wheels co-axially with the primary shaft.

Devices of this kind are suited especially for driving the several axles or wheel shafts of a vehicle, for instance inthe manner in which two wheel shafts are to be driven, each thereof being driven by a separate secondary wheel, by one stage ofthe two-stage transformer.

It is, according to the present invention, furthermore possible to start a vehicle with the aid of several wheel shafts in order to utilize the adhesion weight, but torun, when a certain speed has been attained, with only one wheel shaft.

For this purpose the present improved momentv transformer is connected with a. hydraulic gearin'gicomprising a primary andV a secondary wheel,

preferably a second turbo torque transformer, the secondary member of which is connected with one of the secondary members of the main transformer, so that a mechanical coupling is obviated. When starting, the first transformer which turns several wheel'shafts is used, and when a certain speed has been attained, said first transformer is rendered inoperative, for instance by being emptied, and the second, additional transformer is connected with the driving gear, the wheels of the main transformer then running idle.

Instead of a second additional transformer a coupling, for instance a hydro-dynamic coupuns, may be'used.

The invention is illustrated -diagraminatically and by way of example on the accompanying drawing, in; which Figure 1 is partly a transl verse section, and partly a front-view of, a turbo torque transformer designed according to this invention.' Figure 2 is a similar representationv ,showing a modification.

Onthe drawing, I denotes a mainl transformer and l1 a second additional transformer, I'(Fig. 1) denotes the primary wheel of the main transformer whichgis xed tothe primary shaft 2.

. Into the circuit of the liquid of the transformer are inserted two secondary wheels l and 5, of 'which'the iirst (3) is connected with a sleeve or short vhollow shaft 4 surrounding the shaft 2` and having secured to it a gear-wheel It* The secondary wheel 5 is xed to a shaft II provided with a gear-wheeli. 'I'he gear-wheels I* `and Il mesh with gear-wheels 1 and 8" secured to `shafts -1 and 8 which constitute; or are iconnected with, the driving shafts of the vehicle (ci. so-54) carrying the wheels 'Ib and 8b. The entire gearing is intended for driving two axles or wheelshafts of the vehicle. 9 denotes a guide Wheel likewise constituting a member of the transformer. y l

By suitably selecting the ratio of transmission vof the gear-wheels 4 and 'Ia on the one side and 6*3L and Ila on the other side, the number of revolutions of the two secondary wheels 3 and 5 may be brought into such aratio as is desirable in hydro-dynamic practice.

The short hollow shaft I I is connected with the secondary wheel Ill' of the transformer II. The

primary shaft! extends through the sleeve or hollow shaft II and is provided with a secondary primary wheel I2, to the circuit of which is included said wheel I I), as well as a stationary guide wheel I3.-

When the transformer I has been connnected up to the driving gear of the vehicle, for instance at starting, the two shafts 'I and 8 are driven by the intermediarygof the gear-wheels 4 and "I'EL on 'the one side and 6 and I3a on the other side. When a certain speed has been attained, the transformer I is` emptied so as thereby to be disconnected from the gearing and the transformer II is connected up to the same by filling with fluid so that now solelylthe shaft 8 is driven, whereas the transformer I and the shaft 1 'run idle.

In the modification illustrated in Fig. 2, the arrangement and combination of the parts is practically the same as in Fig. 1, with theex` ception that in lieu of the additional transformer of Fig. 2 (II) a hydro-dynamic coupling (III) is provided. The action of the main transformer (I) is the same as inI the other constructional forms shown and described. I5 denotes the sec- Iondary. wheel of the hydro-dynamic coupling which is connected with the sleeve or hollow shaft Il. I4 denotes the primary wheel of the coupling.` Besides the just described differences betwen the Figs. l and 2, another difference resides therein that the stationary guide-whee1 I3 of Fig. 1 has been dispensed with in Fig. 2.

I wish it to be understood that my invention is not limited to the two constructional forms shownmerely by way of example.l Many other constructional forms all embodying the principle `of my invention are possible.'

Q IA claim: l Y

1i In combination, a turbo torque transformer comprising a primary wheel and a. plurality of secondary wheels, another transformer of the typedescribed comprising a primary wheel and a secondary wheel, a common shaftfor the primary wheels of said two transformers and each transformer having -a guide wheel,l a rigid connection `between one of the secondary wheels of the one transformer and the secondary `wheel of the other transformer, and secondary shafts al1 able to roondary shafts capable of rotation in the samedirection independent. from one another, and

each having one of said secondary wheels of the transformer xed thereto.

3. In combination, a turbo torque transformer, comprising a primary wheel and a plurality of secondary wheels, a hydraulic gearing comprising a primary Wheel and a secondary wheel, a n

common shaft for the primary wheels of the said transformer-and gearing, a rigid connection between one of ine secondary wheels of the transformer and a secondary wheel of the hydraulic gearing, and secondary shafts-al1 being capable of rotation in the same direction independent from one another and each having one of the said secondary-wheels of the transformer afiixed thereto.

HERMANN FOTTINGER. 

